Hello there Salsagirl, Ben here.
18MAY15 @ 9:45pm East USA time
Please try to calm down and get into a "safe" position where things don't upset you so much. Where the symptoms subside somewhat, then stay there for a while until you can think a little more clearly. For me it's lieing down on my Left side, head up on a large pillow. Then, tell yourself what ever is wrong, it can't be so serious as those things, your imagination is running things.
Next, try to think about the different types of things that you mentioned and try to eliminate them one by one. For example, if you think it has something to do with your heart, try to measure your heart rate. Check your blood pressure. Try to do the same thing with those other things too.
Try to think logically. You surely don't have cancer or a stroke, because they would have seen it in the scans or blood work. Try to do this type of thinking with the other ideas too. Eventually you may be able to calm yourself to the point where you arn't thinking about those terrible possibilities, because logically they have no merit.
Dizziness and foggy head are not life threatening symptoms in your case because the doctors have been looking directly at the life threatening causes of those things. My symptoms were dizziness and foggy head, and I also had a full feeling in my ears. Those are normal symptoms for Vestibualr neuritis and Labyrinthitis. They can be controlled somewhat with decongestants even if it means steriodal anti inflamitory drugs. If over the counter stuff isn't working, there are stronger ones the doc can prescribe.
Remember the doctors run all those tests and diagnostics to eliminate possibilities one by one. You must get a hold of yourself and believe that they know what they are doing and that you don't have one of the dreaded things you mentioned.
If you can, focus your thaughts on those things that are not so serious, like the dizziness is coming from BPPV, or Vestubular inflamation. Something that can be overcome without serious operations.
For a moral booster, when you do get calmed down, try to go to the web site where Dr. Carol Foster of Univ. Colorado, tells about her bout with Menieres' and how she had to have the nerve cut, (that's a very serious plan of attack) only then she was hit with BPPV,. Read how she felt, what she did in her studies, and how she devised a self-help maneuver to stop that menace. I ask you to read her account because it might give you the courage to believe, and try to get into see someone that will help this time.
I hope you can get in to see a doctor even if you have to get someone to take you and go to an emergency room. Your situation sounds like you really need to get professional help soon. You need to stop some of the things that are bothering you like the fullness in your ears and the headaches, so you arn't so overwhelmed with everything all at once.
One last thing, You might consider keeping a diary or daily log of how you feel, and of each episode, and the doctor visits. That way you can go back and relive the previous "attacks" and read what the doctors have said about them and the tests and the test results. This should give you a logical way to see if you are over reacting and clear up some of the mystery as to whether or not some things are for sure not there.
Salsagirl, I sincerely feel for you, your insecurity is normal for someone who is dealing with dizziness for the first few times, especially if you are young. Try to believe you will get help and relief if you can just keep on trying. I wish you well asap.
Ben